Thread cutter



July 14, 1931. R. B. TRESNER 1,814,196

THREAD CUTTER Filed Nov. 27. 1929 2 Sheets-Sheet 1 fiaymandfi Wes/Yer INVENTOR July 14, 1931 R. B. TRESNER THREAD CUTTER Filed NOV. 2'7. 1929 2 Sheets-Shoot 2 Ill-ll L ATTORNEY Patented July 14, 1931 UNETE STATE serene RAYMOND B. TRESNER OF MABTON, WASHINGTON THEE-AD CUTTER Application filed November 27, 1829. Serial No. 410,138.

This invention relates to a thread cutter for a shoe making, repairing or patching machine, the general object of the invention being to provide means for cutting the thread after the sewing operation has been completed, thus eliminating waste of thread and knotting of the thread and saving labor.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended 7, claims. 5 In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several Views, and in which Figure 1 is an elevation of part of a sewing machine, showing the invention thereon.

Figure 2 is a top plan view of the invention, showing the parts in cutting position. Figure 3 is a similar view, but showing the parts retracted.

Figure 4 is a section on line 4- of Fig ure 3.

Figure 5 is a section on line 5-5 of Figure 3.

In these views, the numeral 1 indicates a channel shaped supporting member which is attached to the arm a o-fthe sewing machine A by the screws 2 which pass through the flanges of the member into the arm, and 3 indicates a cover member also of channel shape and having projections a on its flanges which pass through holes in the top of the member 1 and are bent over to fasten the cover member to the channel-shaped member.

4o This cover member forms a guide for the sliding plate 5.

A rod 6 has its front end bent and the extremity of this end carries a pin 7 which passes through a slot 8 in the top of the channel member and is connected with the rear end of the sliding plate. The bent end of the member 6 passes through a slot 9 formed in one side of the member 1 and said rod is guided for longitudinal movement in a plate 10 fastened to the machine in rear of the member 1 and a handle 11 is attached to the rear end of the rod and operates through a slot 12 in the plate 10. A spring 13 connects the bent end of the rod with the rear end of the plate 10 and acts to hold the sliding bar in retracted position, as shown in Figure 3. By grasping the handle 11 and exerting forward pressure thereon, the rod will be moved forwardly against the action of its spring and thus project the sliding plate 5, as shown in Figure 2.

A small bar 14 has a pin 15 at its rear end which passes through a slot 16 in the top of the member 1 and this pin engages a small slot 17 in the. sliding plate 5 and a pin 18 is carried by the front end of the bar 14; and engages a small slot 19 in the front end of the plate 5. The cutters or shoes 20 are pivoted to the reduced front end of the plate 5, as shown at 21, and the rear ends of these cutters are connected by the links 22 with the pin 18. Thus as the plate 5 is moved rearwardly, its pin 15, striking the rear end of the slot 16 in the member 1, will prevent further movement of the bar 1e so that the continued rear movement of the plate 5 will cause the pin 15 to engage the front end of the slot 17 andrthe pin 18 will engage the front end of the slot 19. As the pivotal point 21 of the shoes 20 continues to move rearwardly with the plate 5 while the bar 1 1 remains stationary, the links 22 will cause the shoes or cutters to open, as shown in Figure 3. it is desired to cut the thread at the end of the sewing operation, the handle 11 is thrown forwardly so that the plate 5 and the parts associated therewith are projected to place the shoes under the needle and at the completion of this movement, the pin 15 will strike the front end of the slot 16 so that the bar 14 will be held against further movement and as the plate 5 continues its forward movement, the pull on the links by the bar 14:, which is now stationary, will close the cutters and thus the thread will be cut at the needle, as shown in Figure 1. When the parts are returned to normal or retracted position, the cutters will be again opened, as before described.

Then when As the small pin, which is used to release the sewing plate, is covered by the device, I provide a small lever 23 for pressing this pin, this lever being pivoted at 24:, to one side of the member 1 and has an inwardly bent end 25 for engaging the pin when the lever is manipulated.

Thus it will be seen that I have provided simple means which can be quickly and easily applied to a sewing machine for cutting the thread at the needle so that waste of thread is prevented and it is not necessary for the operator to look around for a knife to cut the thread, thus saving time, and it also eliminates the thread rolling up and forming knots which are liable to cause sore feet and wear holes in the stockings.

It is thought from the foregoing description that theadvantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall withr in the scope of the appended claims.

What I claim is 1. In combination with a sewing machine for repairing and making shoes, a thread cutter comprising a supporting member adapted to be connected with the arm of the sewing machine, a sliding member in the supporting member, a pair of pivoted cutters at the forward end of the sliding member, a bar carried by the sliding member, said sliding member having a pair of small slots therein, pins at the ends of the bar passing through the slots, links connecting the forward pin with the rear ends of the cutters, said supporting member having a slot therein into which the rear pin on the bar projects, said slot being so formed that the pin, engaging the rear wall thereof, will arrest the movement of the bar before the sliding member ceases its movement and the front end of the slot will arrest movement of the bar before the sliding member reaches its forward limit of movement, whereby the cutters are opened when the sliding member is retracted and closed at the forward limit of movement of the sliding member and manually operated means for operating the sliding member.

2. In combination with a sewing machine for repairing and making shoes, a thread cutter comprising a supporting member adapted to be connected with the arm of the sewing machine, a sliding member in the supporting member, a pair of pivoted cutters at the forward end of the sliding member, a bar carried by the sliding member, said sliding member having a pair of small slots therein, pins at the ends of the bar passing through the slots, links connecting the forward pin with the rear ends of the cutters, said supporting, member having a slot therein into which the rear pin on the bar projects, said slot being so formed that the pin, engaging the rear wall thereof, will arrest the movement of the bar before the sliding member ceases its movement and the front end of the slot will arrest movement of the bar before the sliding member reaches its forward limit of movement, whereby the cutters are opened when the sliding member is retracted and closed at the forward limit of movement of the sliding member, manually operated means for operating the sliding member, such means comprising a bar connected with the sliding member, a guide on the arm of the sewing machine for the bar, a spring for normally holding the bar and the sliding member in retracted position and a handle on the bar.

In testimony whereof I afiix my signature.

RAYMOND B. TRESNER, 

